A quarter-pound hamburger with all the fixings has a mass 190 g . The food energy...
A quarter-pound hamburger with all the fixings has a mass 190 g . The food energy of the hamburger is 1.7 MJ .
a) What is the energy equivalent of the mass of the hamburger?
b) By what factor does the energy equivalent exceed the food energy?
Homework Answers
from Eienstein's mass energy relation
E = m*c^2
m = mass of hamburger
E = energy equivalent of mass
c = speed of light = 3*10^8 m/s
E = 0.19*(3*10^8)^2 = 1.71*10^16 J
=========================
(b)
energy equivalent/energy of hamburger = 1.71*10^16/1.7*10^6 = 10^10 <<<<----------answer
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